Plate-valve for blowing-engines and the like



1.,H. WATTERS. PLATE VALVE FOR mowme memes AND THE LIKE.

APPLICAIION FILED FEE-25.19I9.

Patented Fb.10,1 9 20.

2 SHEETS-SHEET I. w

Fla g FIG. 2.

J. H. WAIT EH8. I PLATE VALVE FOR BLOWING ENGINES ANDTHE LIKE.

APPLICATION FILED FEB. 25, I919- Patented Feb. 10, 1920.

2 SHEETh-SHEEI 2 FIG. 5:

A TTOHWEY inaft UNITED STATES PATENT OFFICE.

JOSEPH HENRY WATTERS, 0F ENSLEY, ALABAMA.

' PLATE-VALVE FOR BLOWING-ENGINES AND THE LIKE.

- T0 all whom it may concern:

I Be it known that I, JOSEPH HENRY WAT- "FEES,- a oitizen'of the United States', residing in Ensley, Alabama, have invented certain new and useful Improvements in Plate- Valves for- Blowing-Engines and the like, of which the following is a Specification.

The invention relates to'plate valves such as are generally used on blowing engines, air compressors and the like and provides an improvement by which the life of the valve is very much increased and other advantagesare secured as stated indetail hereer. 1 The accompanying drawings illustrate an embodiment of 'the invention. I Figure 1 is'adiametral section of part of the cylinder of a blowing engine with the piston in elevation:

Fig.2 is a section through the central portion of the valve;

Fig. 3 is a section approximately on the line 3-3 of Fig. 4;

Fig. 4: is a diametral section through the complete valve on the line 1-l of Fig. 3.

The invention is shown applied to an in let valve but may be equally well applied to outlet valves.

Referring to Fig. 1 the cylinder 1 of the blowing engine is formed with an inlet port 2 and an inlet passage 3 leading through the inlet valve shown as a whole at 4, to the interior 5 of the cylinder. The piston 6 is reciprocated by the rod 7 and is assumed to be moving in the direction of the arrow which causes'a suction through the valve 4., the lat= ter opening to admit air as indicated by the arrows. On the reverse stroke of the piston the inlet valve 4 is closed by the pressure within the cylinder and one or more outlet valves (not shown, but working on the same principle) at other points in the cylinder are opened by the same pressure to force the air outward.

The valve comprises a seat 8, guard 9 and a plate 10 movable back and forth in the space between the seat and the guard. The plate is provided with a number of apertures 11. The seat 8 has apertures 12 out of line with those of the plate, and the guard 9 has apertures 13 in line with those of the plate. When the plate is forced by the air pressure against its seat the passage of air /is cut off. When thepressure or suction forces the plate in the opposite direction against the guard air passes through the Specification of Letters Patent.

Patented Feb. 10, 1920.

application filed February 25, 1919. Serial No. 279,115.

openings 12 of the seat and the openings 11 and 13 of the plate and guard.

The seat and guard are fastened together by studs or bolts 14, a number of such studs being provided to guide the plate accurately and to prevent its binding at. any point in its movement. Spacers 15 on the studs hold the seat and guard properly spaced apart. In order that the valve shall close promptly on the reversal ofthe direction of 'the air pressure springs 16 are arranged to bear against collars 17 on the studs or spacers and to press the plate toward its seat.

The plates are usually of thinsheet steel.

hey are reversed back and forth on the guiding studs at each reciprocation of the piston and, as commonly constructed heretofore, they wore rapidly on their studs, and

1 in the course of time had to be discarded because they ceased to be guided to a proper seating position with their openings entirely out of register with those of the scat, thus permitting leakage; reducing the capacity ofv the engine and increasing the power consumptionnecessary to deliver a required quantity of air.

I propose to provide between the plate and the several guiding studs bushings having a hub 18 passing through the plate and a flange 19 which bears against a face of the plate and serves as a bearing for the spring 16. Such a bushing has several advantages.

Its bearing surface on the stud or spacer can be made much wider than the thickness of the plate. Consequently its rate of wear will be correspondingly less and the life of the valve in good working condition will be prolonged. Also, providing a longer bearing on the guide stud it serves as a better security against the tilting and binding of the plate'during its movement; consequently the valve can be made with a smaller number of guide studs than are common with the old 7 type. Being engaged by the spring it is held in lace without any other fastening means. herefore, when the bushings of a and a half to three and a half years. The cost of valves for such engines is considerably reduced, the cost of the bushings being a, small item, compared with that of the plates. The bushings may be of case hardenedsteed or other material which will itself be fairly durable.

The invention may be. applied to the present type of valves, where the guide openings in the plates have become worn, by reaming out such openings to fit the hubs of the bushin s and inserting such bushings.

hough I have described with great particularity of detail a certain embodiment of my invention, yet it is not to be understood therefrom that the invention is restricted to the particular embodiment described. Various modificationsthereof in detail and in the arrangement of theparts may be made by those skilled in the art Without departing from the invention as defined in the following claims.

vWhatI claim is- 1. -An air valve the like having an apeitured plate of thin sheet metal, a seat having apertures out of line with those of the plate and a guard having apertures in line with those of the plate, said plate being adapted to be pressed against its seat to close the valve and against, its guard to open the valve, studs securing the seat to the guard extending through the plate and constituting bearings for the latthrough the plate,

for blowing engines and ter and bushingsicarried between the studs on the studs which is wider than the greatest thickness of the plate.

2 An air valve for blowing engines and the like having an apertured plate of thin sheet metal a seat having apertures out of line with those of-the plate, and a guard having apertures in line with those of the plate, said plate being adapted to be pressed against its seat to close the valve and against its guard to open the valve, studs extending sleeves surrounding an intermediate portion thereof, said studs and said sleeves being adapted to secure the said guard to said seat in a fixed spaced relationship, and bushings carried between the sleeves and the plate and having a bearing surface on the sleeves which is Wider than the thickness of the plate, said sleeves extending into counterbores in said guard and engaging shoulders therein, said bushin s havlng flanges, springs extending intosaid counterbores and bearingagainst'the flanges of said bushings to press the plate to its seat, the said counterbores being of sufficient size to receive the entire springs and the flanges of said bushings when the plate is lifted off its seat.

' In witness whereof, I have hereunto signed my name.

JOSEPH HENRY WATTERS. 

